Cop-holder for sewing-machine shuttles



(No Model.)

S. W. WARDWELL, Jr; GOP HOLDER FOR SEWING MACHINE SHUTTLES.

No, 550,701. Patented Dec. 3,1895.

UNTTE STATES PATENT FFICE.

COP-HOLDER FOR SEWING-MACHINE SHUTTLES.

SPECIFICATION forming part of Letters Patent No. 550,701, dated December3, 1895.

Application filed October 17, 1894. 1 Serial No. 526,196. (No model.)

To aZZ whom it may concern:

Be it known that I, SIMON W. WARnwELL, J12, a citizen of the UnitedStates, residing at Boston, in the county of Suffolk and State ofMassachusetts,have invented certain new and useful Improvements inBobbins, of which the following is a specification.

My invention relates to cop-holders for sewing-machine cops; and it hasfor its object to improve the construction to better adapt them forholding the cop and overcome objections incident to usual constructions;and my invention consists in a cop-holder having the various features ofconstruction and arrangement substantially as hereinafter moreparticularly set forth.

In the accompanying drawings, Figure 1 is a side View of the parts ofthe cop-holder separated with the cop such as I prefer to use betweenthem. Fig. 2 is a vertical section through the same. Figs. 3 and 4 arerespectively inside views of the cop-holder heads. Figs. 5 and 6 areviews illustrating modifications, and Fig. 7 is a plan of Fig. 6.

All the figures are somewhat enlarged be yond the actual size for thepurposes of clearness.

I'Ieretofore cop-holders for sewing-machine cops have been soconstructed that in consequence of the varying thickness of the cops oras a cop was reduced in diameter from the use of the thread there wouldbe spaces between the sides of the cop and the ends of the cop-holder,and the thread would slip from the edge of the cop and get between theside of the cop and the cop-holder head and sometimes wrapped around theaxle and broken. Even where the thread was not broken the constantslipping from aposition tangential to the periphery of the cop to aposition across the side or end of the cop resulted in variations oftension, which produced defective stitching.

The results of my invention may be secured by different constructions.Thus in Fig. 5 A B are the separable heads of the cop holder b, a stemprojecting from the head 13 and having a threaded opening m at the end,the head A having a sleeve 0, around which is curled a spiral spring 0,secured at its inner endto the head. D is a cap having a threaded steine, adapted to the threaded opening on,

and a flange f, adapted to bear on the spring c. The cops, as usual,have central openings, so that a cop can be put on the stem 1).

The head A can then be applied and the cap D put in place and screweddown, so that the spring 0 will cause the cap A to bear constantly uponthe side of the cop.

In the construction shown in Figs. 6 and 7 the stem 1) is hollow andincloses a spiral spring 6 bearing on a lip t and on a shoulder of ahead it on a rod g, extending through the spring and having a cross-barh at the other end. The head A has a slot y, adapted for'the passage ofthe crossbar. The cop is put upon the stem 1), theheadA is applied n thespring 6 will draw in the rod g and press the cross-bar on the head Aand carry the latter against the side of the cop.

My preferred construction is illustrated in Figs. 1 to 4, in which boththe heads A B are preferably slightly concaved toward each other, asshown. The head A has a central orifice a, with an inwardly-projectingsleeve or bearing Cb, which is tapering toward its inner extremity, andthe opening a isalso tapering, contracting toward the inner extremity ofthe sleeve. The head B is also provided with a hollow stem or projection19, which is somewhat longer than the sleeve or bearingpiece a, withwhich it co-operates in the manner hereinafter described, and the twoform the axle of the cop-holder. This stem at b is tapering from theouter surface of the head B toward the center of the cop-holder for acertain distance and then expands outwardly at 6 and the end 12 isrounded. Thus it will be seen that the stem has an inclined plane at itsouter end, adapted to engage an inclined plane upon the head A. Thisstem 1) may .be variously formed, but is preferably a cylinder split toform a series of spring-fingers. It may be integral with one of theheads or made separate and riveted to it, and although it is preferablethat the stem should have two portions inclined toward each other theportion fixed to the head B need not necessarily be inclined, but mayhave parallel sides, as in Figs. 5 or 6, although when inclined itfurnishes a better support to center the cop. The cop is put on thestem 1) and the end of the latter is pushed into the sleeve (1/, asshown in Fig. 2, when the coacting inclines will draw the heads togetherupon the cop. The side pieces of the cop-holder can be readily separatedby merely forcing them apart, the spring fingers or portions of the stemcollapsing for that purpose.

It will be seen that in each of the constructions above described theheads of the copholder are automatically drawn toward each other uponthe cop without the application of any pressure from without thecop-holderas by springs, &c., upon the shuttleso that the cop-holdersmay be used with any kind of shuttle adapted to receive them, andtherefore that however the cops may vary in thickness and whatever maybe the reduction in the diameter of the cop as the thread is drawntherefrom the heads will always bear upon the sides of the cop at theperiphery, so that it is impossible for the thread to slip from theperiphery between the cop and head at either side.

XVithout limiting myself to the constructions shown, what I claim is l.A cop -holder comprising two convex heads separable to receive a cop,and a connection between the heads arranged to draw the heads togetherautomatically to cause them to bear upon the edges of the cop at itsperiphery, substantially as described.

2. A cop holder comprising two separable heads adapted to embrace a copand means for constantly and yieldingly drawing the heads toward eachother against the cop, substantially as described.

3. A cop-holder comprising two heads having inward projections, providedwith con tacting inclined faces, with means for pressing one faceagainst the other to thereby draw the heads together automatically,substantially as described.

4. A cop-holder consisting of a head, having a tapering sleeve, and ahead having a stem consisting of spring fingers with a taperin g bearingcontacting with the tapering sleeve, to draw the side pieces toward eachother, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

SIMON V. \VARDVELL, JR.

\Vitnesses PHILIP E. BRADY, ARTHUR B. CUMMINGS.

